|Publication number||US7065417 B2|
|Application number||US 10/059,777|
|Publication date||Jun 20, 2006|
|Filing date||Jan 29, 2002|
|Priority date||Nov 24, 1997|
|Also published as||CN1133167C, CN1218258A, DE69837907D1, DE69837907T2, EP0924708A2, EP0924708A3, EP0924708B1, EP1684300A2, EP1684300A3, EP1688954A2, EP1688954A3, EP1826767A2, EP1826767A3, EP1843353A2, EP1843353A3, EP1843354A2, EP1843354A3, US6629000, US8116890, US8170700, US8175727, US8214064, US8615315, US8843225, US20020072818, US20060195206, US20070038319, US20070038320, US20070112448, US20070112449, US20070112450, US20070276522, US20080004730, US20120029673|
|Publication number||059777, 10059777, US 7065417 B2, US 7065417B2, US-B2-7065417, US7065417 B2, US7065417B2|
|Inventors||Kwang-su Moon, Jung-ha Hwang|
|Original Assignee||Sigmatel, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (90), Non-Patent Citations (12), Referenced by (18), Classifications (28), Legal Events (15)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application is a divisional of U.S. application Ser. No. 09/061,647, filed Apr. 17, 1998.
(a) Field of the Invention
The present invention relates to a portable sound reproducing system and method, and more particularly, to a portable sound reproducing system and a reproducing method thereof in which sound data, compressed using the Moving Picture Experts Group (MPEG) method and stored in a memory device, is converted into an audible format and output through headphones, speakers, etc.
(b) Description of the Related Art
Generally, data processed to be listened or viewed is stored in a memory medium then output through a reproduction device. The most common examples include analog data stored on magnetic tape which is output through a cassette player, and digital data stored on a compact disc which is output through a compact disc player.
Recent developments in digital technology has enabled memory media used in personal computers to undergo vast improvements. Namely, memory media used in PCs are becoming increasingly lightweight and compact, and providing the user with more capacity to store memory.
However, with the increase in required memory needed to run operating systems and application software, there is a limit to how efficiently memory media can be used. In an attempt to remedy this problem, a variety of methods have been devised to enable the efficient use of digital data. The MPEG standard is one of these methods which increases the storage capacity of memory media by compressing data stored therein.
Namely, by using the MPEG method of compressing data, data is compressed to roughly one-twelfth its original size without compromising sound or visual quality. After compresing data utilizing software or hardware made for this purpose, the data is then stored in a storage medium, then converted back into its original state using the MPEG method such that the data is placed in a form that can be heard or seen by the user. The MPEG method, therefore greatly increases data storage capacity.
With all the conventional sound reproduction systems, i.e., tape players and compact disc players, and PCs, etc. which are equipped with the capability to reproduce MPEG-compressed data, many disadvantages are encountered by the user.
In particular, in using cassette players, which reproduce data stored on magnetic tape, because the same amount of time is needed to store (record) data as it does to reproduce (play) the data, the storing process is time-consuming, and heat generated during the process acts to deteriorate the quality of the recording such that the quality of the sound reproduced is decreased. Moreover, because magnetic tape is easily worn, the repetitive playing of data stored on the cassette tape also acts to reduce sound quality.
Compact disc players and the discs used therein also have many problems. Namely, recording is not possible on compact discs. Further, because of the mechanical fragility of CD players, reproduction malfunctions occur when the players receive even slight outside shocks. Finally, CD players have a limited life span as the mechanical parts in the devices often break over time.
The storage media used in cassette and CD players also have the drawback of occupying much space. Also, users must take great care that the storage media are placed in an area that is not exposed to heat, direct sunlight, etc.
With regard to prior art devices such as PCs used to reproduce data stored using the MPEG method, as these devices are not portable, the location at which users can access the sound and images is limited to the location of the device. In addition, when using a PC to reproduce data compressed using the MPEG method, the cost of equipping the PC with software or hardware to enable this function is high. Also, because various types of sound data are stored on a plurality of storage media, the user must purchase many kinds of storage media and undergo complicated processes to reproduce the data stored therein.
Finally, in all of the above cases, users must physically go to retail stores to purchase storage media, causing inconvenience to the user.
The present invention has been made in an effort to solve the above problems. It is an object of the present invention to provide an MPEG portable sound reproducing system and a reproducing method thereof which reproduces sound data, compressed and stored on a memory chip using the MPEG method, into an audible format.
It is another object of the present invention to provide an MPEG portable sound reproducing system which, by storing data on a semiconductor storage medium, prevents heat from generating during recording as in the prior art cassette tape player, and avoids damage from exposure to heat as with conventional cassette tapes, compact discs, and other storage media.
It is still yet another object of the present invention to provide an MPEG portable sound reproducing system which enables connection to telecommunications networks and data vending machines such that various data can be downloaded, thereby enabling users to enjoy the benefits—speed, convenience, variety, etc.—of these systems.
It is still yet another object of the present invention to provide an MPEG portable sound reproducing system in which data downloaded via telecommunications networks and data vending machines as in the above is able to be accessed by and saved on a personal computer.
It is still yet another object of the present invention to provide an MPEG portable sound reproducing system which does not require separate storage media as with cassette players and compact disc players such that the device can be made to be lightweight and thin, and the need for physical storage space of the storage media is not needed.
To achieve the above objects, the present invention provides an MPEG portable sound reproducing system and a method for reproducing sound data compressed using the MPEG method. The inventive system includes power supply means for supplying operational power to the system, the power supply means being realized through a secondary battery; power processing means for rectifying power supplied from the power supply means to stable voltage and current; information display means for displaying numbers and combinations of letters related to operational states of the system; control means for controlling all operations of converting and reproducing sound data compressed using the MPEG method; data storage means for storing MPEG-compressed sound data in a designated address according to signals output from the control means; information selecting means for selecting general operations to reproduce, download, and apply selected sound data stored in the data storage means; sound reproducing means for converting sound data stored in the data storage means into a format audible to users according to signals output from the control means; and transmitting/receiving means for transmitting and receiving sound data and program data from external devices.
The inventive sound reproducing method includes the steps of initializing the system and detecting a state of a flash ROM when power is supplied to information selecting means; loading a main program from the flash ROM, if it is detected that the state of the flash ROM is normal, and completing booting of required software; and downloading and reproducing stored sound data, if the set up of the operational environment is completed, according to signals output from the information selecting means a state of operational power, and whether connection is made to an external power supply and to external telecommunications systems, etc.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention, and, together with the description, serve to explain the principles of the invention:
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring first to
The power supply portion 100 is realized through a nickel-cadmium (Ni—CD), nickel-metal hydride (Ni—MH), lithium-ion, or lithium-polymer secondary battery, and converts chemical energy into electrical energy for supply of the same to the portable sound reproducing system. Also, the power supply portion 100 is recharged by electricity received through an adaptor.
The power processor 200 receives power from the power supply portion 100 or directly through the adaptor, rectifies the power to stable voltage current, and supplies the power to the control portion 500 as drive power. When receiving power through the adaptor, the power processor 200 supplies power to the power supply portion 100 for recharging the same.
The information selector 300 is realized through various predetermined keys operated by the user, and outputs electrical signals according to the user selections to control the supply of power, extract data for reproduction, control various functions related to the reproduction of data, and transmit and receive data.
In more detail, the information selector 300 comprises a forward switch for advancing to a subsequent selection when pressed for under a predetermined amount of time of preferably under one second, and which quickly plays data when continually pressed for a predetermined amount of time of preferably over one second; a reverse switch for returning to a beginning of a present selection if the selection is in mid-play or reversing to a previous selection if between selections when pressed for under a predetermined amount of time of preferably under one second, and which quickly plays data in reverse when continually pressed for a predetermined amount of time of preferably over one second; a play/stop switch for reoproducing data when pressed one time, and, in a state of reproducing data, discontinuing the present play mode when pressed again, then cutting off the power; a repeat switch for replaying the present selection when pressed one time, repeating all selections when pressed two times, and cancelling all repeat commands when pressed for a predetermined time of preferably over three seconds; and a random switch for randomly reproducing the selections in a random order when pressed.
The information display portion 400 is realized through an LCD (liquid crystal display) and displays various numbers and letters related to the various modes realized through the above switches.
The control portion 500 controls all the various operations for storing and reproducing sound data compressed using the MPEG method. The control portion 500, as shown in
All the above elements of the control, portion 500 are connected through a combination of an interrupt line and an I/O bus.
The data storage portion 600 stores sound data compressed using the MPEG method downloaded through the transmitter/receiver 800 according to signals from the control portion 500. Further, as shown in
The sound reproducing portion 700 converts sound data stored in the data storage portion 600 into an audible format according to signals applied from the control portion 500. The sound reproducing portion 700, as shown in
The transmitter/receiver 800 is connected to a PC, data vending machine, or other such external devices and either transmits sound or program data thereto or receives sound or program data therefrom.
A preferred reproducing method of data compressed using the MPEG method for the portable sound reproducing system structured as in the above will be described hereinafter with reference to
First, if the user presses an ON switch of the information selector 300 to reproduce and listen to particular sound data among all the digital data compressed using the MPEG method and stored in the data storage portion 600, the CPU 501 of the control portion 500 enters an operational mode by receiving power via the power processor 200 from the power supply portion 100 or adaptor (S1000).
Next, the CPU 501 runs the main program and completes booting of required software (S1300), then determines if key signals of the information selector 300, input through the keyboard interface 507 and the MEM/IO bus, are detected (S1400).
If key signals are detected in step S1400, it is determined if there is a power OFF selection signal, selected by the user to cut off power supplied from the power processor 200 (S1410). If the power OFF signal is detected, operational power applied from the power processor 200 is cut off and the system is put in a standby mode (S1415).
If no power OFF signal is detected in step S1400, it is detected if there has been an input of a sound reproduction signal for restoring and reproducing a selection of data compressed using the MPEG method and stored in the flash ROM 603 of the data storage portion 600 (S1420).
If it is determined in step 1420 that the key signal is a reproduction key signal to reproduce sound data stored in the data storage portion 600, the CPU 501 loads the selected sound data to the DSP portion 701 of the sound reproducing portion 700 via the DSP interface 529 of the control portion 500, then returns the digital sound data compressed using the MPEG method to its original state using operating systems software, converts the data into an electric sound signal through the audio portion 703 of the sound reproducing portion 700, and converts the electric signal into a sound signal audible to the user and outputs the same through headphones/speakers 705 (S1425).
In step 1420, if it is detected that the key select signal is not a signal for reproducing sound data or if the system is currently reproducing data, it is then detected if a forward signal has been input (S1430). If a forward key signal is detected in step S1430, the CPU 501 determines if the forward select signal is transmitted for under a predetermined amount of time of less than one second, which if this criterion is met, then advances the selection to the next selection and executes a reproducing operation, and also determines if the forward select signal is transmitted for over a predetermined amount of time of more than one second, and if it is, the present selection is reproduced at a fast speed (S1435).
In step S1430, if a forward key signal is not detected, it is determined if a reverse key signal has been input (S1440). If it has, the current selection being reproduced is either returned to the beginning, or if between selections, a selection is made to the preceding song if the reverse signal is transmitted for under a predetermined time of preferably under one second, or the present playing selection is quickly reversed if the reverse signal is transmitted for over a predetermined amount of time of preferably over one second (S1445).
If a reverse signal is not detected in step 1440, it is then detected if a stop signal has been input (S1450). Here, if a stop signal is detected, it is further determined, using an installed program, if a signal of a predetermined number of times of preferably one time has been input and the present mode is the play mode, in which case the present reproduction operation is discontinued, an if in a stopped mode reproduction is started. Further, in a state where the play mode has been disontinued, if it is detected that the stop signal is transmitted for a predetermined amount of time of preferably more than three seconds, standby power is controlled to OFF (S1455).
In step S1450, if a stop signal is not detected or if it is determined that the system is in a play mode, it is then determined if a repeat signal has been input (S1460). If a repeat signal is detected, the number of input times is determined using an installed program such that the present selection is repeated when it is detected that the signal has been input a predetermined number of times of preferably one time, all sound data stored in the memory of the flash ROM 603 is repeated when the input of two signals is detected, and any repeat command is cancelled when it is detected that the signal is input during a repeat operation (S1465).
Further, if no repeat signal is detected in step 1460, it is then determined if a random signal has been input (S1470). If a random signal is detected in this step, selections are reproduced in random order (S1475), and if a random signal is not detected, the operation to reproduce the sound data compressed using the MPEG method is repeated.
In the above state where sound data selected by the user is being reproduced according to key signals input from the information selector 300, operational power is analyzed in the power processor 200 to determine if a Low Power state exists, disenabling a reproduction operation to be performed, in the power supply portion 100 (S1500). If it is determined that the power supply portion 100 is in a Low Power state in step 1500, it is then determined if the detected present voltage is below a predetermined standard value that would impede the normal reproducing of sound data (S1510).
In the above, if it is determined that the voltage of the power supply portion 100 is less than the predetermined standard value, the control portion 500 outputs a predetermined control signal for display of a warning to the LCD controller 509 via the MEM/IO bus. Here, the LCD controller 509 adjusts power supplied to the matrix of the information display portion 400 such that a “power cut off” message is displayed thereon (S1520).
Simultaneously with the displaying of the “power cut off” message, the CPU 501 of the control portion 500 inputs a data storage signal to the flash ROM 603 of the data storage portion 600 such that the present state is saved (S1530), and controls the power controller 505 via the MEM/IO bus to cut off the supply of power to the power processor (S1540).
In step 1510, if it is determined that the voltage of the power supply portion 100 is above the predetermined standard value, enabling the normal operation of the system, the control portion 500 controls the information display portion 400 via the LCD controller 509 such that a “Low Power” message is displayed (S1550).
After the checking of the power state in step S1500, the CPU 501 of the control portion 500 determines if the power processor 200 is connected to an external power source through the adaptor (S1600). If it is detected that there is a connection with an external power source in step S1600, it is then determined if the power supply portion 100 is fully charged (S1610).
In the above, if it is determined that the power supply portion 100 is fully charged, the charging operation is discontinued, to prevent damage to the power supply portion 100 caused by overcharging, and if it is determined that the power supply portion 100 is not fully charged, it is then determined if power from an external power source is being supplied through the adaptor (S1620). Here, if external power is being supplied in a state where the power supply portion 100 is not fully charged, the power is then supplied to the power supply portion 100 to charge the same (S1630).
After step 1600, where it is determined if there is a connection with an external power source, it is then determined if sound data is being reproduced according to selections made by the user at the information selector 300 (S1700). If sound data is being reproduced in this step, the CPU 501 of the control portion 500 analyzes the sound data checking, for example, data reproduction time, title of selection, type of music, remaining play time for the selection, etc.—and displays the information through the information display portion 400 by controlling the LCD controller 509 (S1710).
Further, the CPU 501 of the control portion 500 accesses the sound data compressed using the MPEG method in the flash ROM 603 of the data storage portion 600, and transmits this sound data to the DSP portion 701 of the sound reproducing portion 700 through the DSP interface 529. Accordingly, the DSP portion 701 processes the MPEG-compressed digital sound data to a predetermined state and converts it to sound signals via the audio portion 703, then reproduces the sound data through headphones/speakers 705 such that the user can listen to the sound (S1720).
Next, it is determined if the selected sound data has been completely reproduced (S1730). If it has, a subsequent sound data selection is searched from the flash ROM 603 (S1740), then sound data to be reproduced is loaded from the flash ROM 603 and preparations are made to reproduce sound data (S1750).
After step S1700, where it is determined if sound data is being reproduced, the CPU 501 of the control portion 500 analyzes signals from the controller 523 to determine if the transmitter/receiver 800 is connected to an external telecommunications system of, for example, a computer having a modem or other telecommunications device installed therein, or a data vending machine selling a variety of data and programs of music, video games, etc. (S1800).
If it is determined in step 1800 that the transmitter/receiver 800 is connected to an external telecommunications system, the inventive system is changed to a downloading load, the data is downloaded (S1810), and it is determined if an error exists in the downloaded data (S1820).
In the above, if it is determined that an error exists in the downloaded data, the CPU 501 of the control portion 500 performs control so that the data is re-transmitted, and if no error exists in the data, the data is stored (S1830). Further, if it is determined that no error exists in the transmitted data in step 1820, the CPU 501 determines if transmission of the data is completed (S1840), designates an address sphere in the data storage portion 600, then downloads and stores the data (S1850).
In the MPEG portable sound reproducing system structured and reproducing MPEG-compressed data as in the above, as sound data is compressed using the MPEG method and stored in a semiconductor chip or other memory element, then reproduced in a format audible to the user, convenience is provided by eliminating the need for records, tapes, CDs, and other such memory media, and many of the drawbacks of using memory media in prior art reproduction devices—reduction in sound quality after recording or repeated playing, fragility of memory media necessitating the need to take great care in storing the same, etc.—are overcome.
Further, because it is possible to connect the inventive system to telecommunications networks and data vending machines to download various data, benefits of speed, convenience, and low cost are provided to the user.
Other embodiments of the invention will be apparent to the skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US4475155||Nov 19, 1981||Oct 2, 1984||Hitachi, Ltd.||I/O Adapter with direct memory access to I/O control information|
|US4905289||Feb 27, 1989||Feb 27, 1990||Deutsche Itt Industries Gmbh||Apparatus for the digital storage of audio signals employing read only memories|
|US4912632||Mar 31, 1988||Mar 27, 1990||International Business Machines Corp.||Memory control subsystem|
|US4970659||Jul 1, 1988||Nov 13, 1990||Texas Instruments Incorporated||Learning aid or game having miniature electronic speech synthesis chip|
|US5119485||May 15, 1989||Jun 2, 1992||Motorola, Inc.||Method for data bus snooping in a data processing system by selective concurrent read and invalidate cache operation|
|US5170490||Sep 28, 1990||Dec 8, 1992||Motorola, Inc.||Radio functions due to voice compression|
|US5337295||May 19, 1992||Aug 9, 1994||Sony Corporation||Digital audio signal reproducing apparatus|
|US5339444||Oct 24, 1991||Aug 16, 1994||Kabushiki Kaisha Toshiba||Portable computer resetting resume error caused from HDD loaded condition being changed and starting OS|
|US5359698||Dec 20, 1991||Oct 25, 1994||Shmuel Goldberg||Portable random access audio recording and playback apparatus|
|US5457672||Dec 27, 1994||Oct 10, 1995||Sony Corporation||Audio reproducing apparatus having a playback resume function after a halt request|
|US5473729||Sep 30, 1992||Dec 5, 1995||Bryant; David P.||Critical incident recorder|
|US5477511||Jul 13, 1994||Dec 19, 1995||Englehardt; C. Duane||Portable documentation system|
|US5491774||Apr 19, 1994||Feb 13, 1996||Comp General Corporation||Handheld record and playback device with flash memory|
|US5502700||Sep 28, 1994||Mar 26, 1996||Sony Corporation||Power saving method and apparatus for intermittently reading reproduction apparatus|
|US5511000||Nov 18, 1993||Apr 23, 1996||Kaloi; Dennis M.||Electronic solid-state record/playback device and system|
|US5535356||Sep 9, 1992||Jul 9, 1996||Samsung Electronics Co., Ltd.||Digital data recording/playback system utilizing EEPROM and ROM memories as a storage medium|
|US5557541||Jul 21, 1994||Sep 17, 1996||Information Highway Media Corporation||Apparatus for distributing subscription and on-demand audio programming|
|US5577918||Sep 27, 1994||Nov 26, 1996||Crowell; Christopher S.||Multi-purpose, universally applicable re-recordable, audible, message delivery system|
|US5606143||Aug 23, 1995||Feb 25, 1997||Artif Technology Corp.||Portable apparatus for transmitting wirelessly both musical accompaniment information stored in an integrated circuit card and a user voice input|
|US5623623||May 11, 1995||Apr 22, 1997||Samsung Electronics Co., Ltd.||Digital storage system adopting semiconductor memory device|
|US5632001||Apr 11, 1994||May 20, 1997||Mitsubishi Denki Kabushiki Kaisha||Mobile communication apparatus having recording/reproducing function|
|US5636186 *||Jul 2, 1996||Jun 3, 1997||Pioneer Electronic Corporation||Multiple audio channels recording and reproduction apparatus|
|US5640458||Oct 22, 1990||Jun 17, 1997||Sony Corporation||Audio signal reproducing apparatus|
|US5668789||Oct 28, 1996||Sep 16, 1997||Sony Corporation||Recording method of recording medium|
|US5670730||May 22, 1995||Sep 23, 1997||Lucent Technologies Inc.||Data protocol and method for segmenting memory for a music chip|
|US5689440||Dec 11, 1996||Nov 18, 1997||Motorola, Inc.||Voice compression method and apparatus in a communication system|
|US5694332||Dec 13, 1994||Dec 2, 1997||Lsi Logic Corporation||MPEG audio decoding system with subframe input buffering|
|US5694516||May 22, 1995||Dec 2, 1997||Lucent Technologies Inc.||Capacitive interface for coupling between a music chip and audio player|
|US5696928||May 22, 1995||Dec 9, 1997||Lucent Technologies||Memory chip architecture for digital storage of prerecorded audio data wherein each of the memory cells are individually addressable|
|US5699336||Jan 18, 1996||Dec 16, 1997||Sony Corporation||Reproducing apparatus having buffer memory and capable of rapidly restarting reproduction and method of controlling the apparatus|
|US5710813 *||Mar 28, 1995||Jan 20, 1998||Olympus Optical Co., Ltd.||Digital voice recording/reproducing apparatus|
|US5724609||Dec 19, 1994||Mar 3, 1998||Fujitsu Limited||Apparatus for transfer-controlling data by direct memory access|
|US5748835||Jul 30, 1996||May 5, 1998||Samsung Electronics Co., Ltd.||Audio signal decoding apparatus and method for a disc driving system|
|US5774863||Apr 3, 1995||Jun 30, 1998||Olympus Optical Co., Ltd.||Speech information recording/reproducing apparatus|
|US5787399||Jul 29, 1997||Jul 28, 1998||Samsung Electronics Co., Ltd.||Portable recording/reproducing device, IC memory card recording format, and recording/reproducing mehtod|
|US5790423||Jun 14, 1995||Aug 4, 1998||Audible, Inc.||Interactive audio transmission receiving and playback system|
|US5794202||Jun 26, 1996||Aug 11, 1998||Samsung Electronics Co., Ltd.||IC card memory having a specific recording format and method for recording/reproducing a digital voice therefrom|
|US5809245||Jan 23, 1996||Sep 15, 1998||Kabushiki Kaisha Toshiba||Multimedia computer system|
|US5839108||Jun 30, 1997||Nov 17, 1998||Norris Communications, Inc.||Flash memory file system in a handheld record and playback device|
|US5841979||May 7, 1996||Nov 24, 1998||Information Highway Media Corp.||Enhanced delivery of audio data|
|US5857114||Dec 30, 1996||Jan 5, 1999||Samsung Electronics Co., Ltd.||DMA system for re-arbitrating memory access priority during DMA transmission when an additional request is received|
|US5870710||Jan 22, 1997||Feb 9, 1999||Sony Corporation||Audio transmission, recording and reproducing system|
|US5903868||Feb 13, 1996||May 11, 1999||Yuen; Henry C.||Audio recorder with retroactive storage|
|US5903871||Apr 15, 1997||May 11, 1999||Olympus Optical Co., Ltd.||Voice recording and/or reproducing apparatus|
|US5930758||Jul 2, 1997||Jul 27, 1999||Sony Corporation||Audio signal reproducing apparatus with semiconductor memory storing coded digital audio data and including a headphone unit|
|US5978755||Mar 6, 1997||Nov 2, 1999||U.S. Philips Corporation||Dictation device for the storage of speech signals|
|US5980262||Jun 2, 1997||Nov 9, 1999||Mitac, Inc.||Method and apparatus for generating musical accompaniment signals at a lower storage space requirement|
|US6007228||May 21, 1997||Dec 28, 1999||Neomagic Corp.||Master digital mixer with digital-audio links to external audio in a docking station and to internal audio inside a portable PC|
|US6031915 *||Jul 19, 1996||Feb 29, 2000||Olympus Optical Co., Ltd.||Voice start recording apparatus|
|US6032081||Sep 24, 1996||Feb 29, 2000||Korea Telecommunication Authority||Dematrixing processor for MPEG-2 multichannel audio decoder|
|US6076063||Oct 31, 1997||Jun 13, 2000||Oki Electric Industry Co., Ltd.||Audio player and recorder employing semiconductor memory as a recording medium|
|US6078742||Dec 19, 1996||Jun 20, 2000||Ati International||Hardware emulation|
|US6108743||Feb 10, 1998||Aug 22, 2000||Intel Corporation||Technique for performing DMA including arbitration between a chained low priority DMA and high priority DMA occurring between two links in the chained low priority|
|US6122699||May 29, 1997||Sep 19, 2000||Canon Kabushiki Kaisha||Data processing apparatus with bus intervention means for controlling interconnection of plural busses|
|US6151286||May 27, 1998||Nov 21, 2000||Sony Corporation||Method and apparatus for recording compressed audio data on recording medium and method for transferring compressed audio data|
|US6182043||Feb 6, 1997||Jan 30, 2001||U.S. Philips Corporation||Dictation system which compresses a speech signal using a user-selectable compression rate|
|US6311092||Sep 8, 1997||Oct 30, 2001||Sony Corporation||Recording apparatus, reproducing apparatus, and recording and/or reproducing apparatus|
|US6321129 *||Dec 31, 1998||Nov 20, 2001||Dictaphone Corporation||Enhanced user control operations for portable digital audio recorder|
|US6332175 *||Feb 12, 1999||Dec 18, 2001||Compaq Computer Corporation||Low power system and method for playing compressed audio data|
|US6377530 *||Feb 12, 1999||Apr 23, 2002||Compaq Computer Corporation||System and method for playing compressed audio data|
|US6453281 *||Jul 30, 1996||Sep 17, 2002||Vxi Corporation||Portable audio database device with icon-based graphical user-interface|
|US6629000 *||Apr 17, 1998||Sep 30, 2003||Mpman.Com Inc.||MPEG portable sound reproducing system and a reproducing method thereof|
|US6695477||Nov 12, 1996||Feb 24, 2004||Sony Corporation||Audio signal reproducing apparatus|
|US6975912 *||Sep 28, 2000||Dec 13, 2005||Sony Corporation||Recording and/or reproducing apparatus and recording apparatus|
|USRE36218||Aug 25, 1994||Jun 1, 1999||Sony Corporation||Disc recording/reproducing apparatus having a servo system capable of successively recording and reproducing tracks on a disc irrespective of turbulence of the servo system due to a disturbance|
|DE29910175U1||Jun 11, 1999||Oct 14, 1999||Tomada Raoul||Gerät zur Lagerung, Bereitstellung und für den Verkauf von MPEG-komprimierten Audiodaten|
|EP0467208A1||Jul 9, 1991||Jan 22, 1992||Hitachi, Ltd.||Digital information system|
|EP0798929A2||Mar 27, 1997||Oct 1, 1997||Nec Corporation||MPEG coded picture decoding apparatus|
|JP3164089B2||Title not available|
|JP2002279730A||Title not available|
|JP2002334521A||Title not available|
|JPH0461069A||Title not available|
|JPH0973299A||Title not available|
|JPH01205630A||Title not available|
|JPH03230319A||Title not available|
|JPH03235109A||Title not available|
|JPH04349269A||Title not available|
|JPH05217292A||Title not available|
|JPH05266645A||Title not available|
|JPH05314655A||Title not available|
|JPH05334893A||Title not available|
|JPH07307674A||Title not available|
|JPH08202499A||Title not available|
|JPH08205093A||Title not available|
|JPH10320000A||Title not available|
|KR910011772A||Title not available|
|KR950035692A||Title not available|
|WO1996008006A1||Sep 8, 1995||Mar 14, 1996||Voice It Worldwide, Inc.||Credit card size audio record and playback device|
|WO1996025738A1||Feb 8, 1996||Aug 22, 1996||Lehmann Michael H||Portable digital dictation device with remote communication|
|WO1997026744A2||Jan 17, 1997||Jul 24, 1997||Garry Douglas Robb||Multifunctional portable telephone|
|1||"A New Implementation of the Silicon Audio Player Based on MPEG/Audio Decoder LSI;" IEEE, Sugiyama et al.; Mar. 1997, pp. 207-215.|
|2||"Audible MobilePlayer and MobilePlayer-Plus User's Guide," Audible, Inc., 1997, pp. 1-7.|
|3||"Compact Mulitmedia Players with PC Memory Cards Silicon View and Shopping Navigation;" IEEE, Iwadere et al., 1997, pp. 451-456.|
|4||"NEC Develops Flash-Memory Personal Stereo;" Audio Week, vol. 6, No. 47, Dec. 1994.|
|5||"NEC Unveils its Miniature Digital Videos, Music Player;" Billboard, Oct. 1995, p. 10.|
|6||"Portable Stereo from Memory Chip Card;" Screen Digest; Jan. 1995.|
|7||"Portable Translator;" IBM Technical Disclosure Bulletin; Nov. 1994, pp. 185-186.|
|8||"Portable Voice Messaging System;" IBM Technical Disclosure Bulletin; Jul. 1995, pp. 257-260.|
|9||"Single-chip Solution for Audio Data Decompression with MPEG Layer 3 Method," ITT Semiconductors, Catalogue of MAS 3503 C, Feb. 1995, pp. 1-8.|
|10||"The Silicon Audio and Audio-Data Compression and Storage System with a Semiconductor Memory Card;" IEEE Transactions on Consumer Electronics, vol. 41, No. 1, Feb. 1995, pp. 186-194.|
|11||"Virtual Jukebox;" Google Groups, Aug. 3, 1997.|
|12||Wampold, J., "Progressive Networks and Audible Inc. Team Up to Make RealAudio Mobile," Sep. 15, 1997.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8116890||Oct 25, 2006||Feb 14, 2012||Mpman.Com, Inc.||Portable sound reproducing system and method|
|US8170700||May 1, 2012||Mpman.Com, Inc.||Portable sound reproducing system and method|
|US8175727||Dec 29, 2006||May 8, 2012||Mpman.Com, Inc.||Portable sound reproducing system and method|
|US8214064||Dec 29, 2006||Jul 3, 2012||Lg Electronics Inc.||Portable sound reproducing system and method|
|US8615315||Oct 25, 2006||Dec 24, 2013||Mpman.Com, Inc.||Portable sound reproducing system and method|
|US8843225||Oct 5, 2011||Sep 23, 2014||Mpman.Com, Inc.||Portable sound reproducing system and method|
|US8882561||Apr 6, 2007||Nov 11, 2014||Mattel, Inc.||Multifunction removable memory device with ornamental housing|
|US20050120165 *||Dec 2, 2003||Jun 2, 2005||Hsien-Rong Liang||Multipurpose media player memory card reader|
|US20060195206 *||Apr 26, 2006||Aug 31, 2006||Sigmatel, Inc.||Portable sound reproducing system and method|
|US20060206339 *||May 18, 2005||Sep 14, 2006||Silvera Marja M||System and method for voice-enabled media content selection on mobile devices|
|US20070038319 *||Oct 25, 2006||Feb 15, 2007||Texas Mp3 Technologies, Ltd.||Portable sound reproducing system and method|
|US20070038320 *||Oct 25, 2006||Feb 15, 2007||Texas Mp3 Technologies, Ltd.||Portable sound reproducing system and method|
|US20070112448 *||Dec 29, 2006||May 17, 2007||Texas Mp3 Technologies, Ltd.||Portable sound reproducing system and method|
|US20070112449 *||Dec 29, 2006||May 17, 2007||Texas Mp3 Technologies, Ltd.||Portable sound reproducing system and method|
|US20070112450 *||Dec 29, 2006||May 17, 2007||Texas Mp3 Technologies, Ltd.||Portable sound reproducing system and method|
|US20070276522 *||Oct 25, 2006||Nov 29, 2007||Texas Mp3 Technologies, Ltd.||Portable sound reproducing system and method|
|US20080004730 *||Dec 29, 2006||Jan 3, 2008||Texas Mp3 Technologies, Ltd.||Portable sound reproducing system and method|
|US20100057470 *||Mar 4, 2010||Apptera, Inc.||System and method for voice-enabled media content selection on mobile devices|
|U.S. Classification||700/94, 369/63, 704/272, 381/61|
|International Classification||G06F3/16, G11B20/00, G10L19/00, G06F17/00, G11C7/16, G11C5/14, G06T9/00|
|Cooperative Classification||G11C7/1006, G11B20/10, G11B27/105, G11B2020/00057, G11B2020/10546, G06T9/007, G11C7/16, G11C5/141, G11B2020/00014, G11C2207/16, G11B2220/61|
|European Classification||G11B27/10A1, G11B20/10, G11C7/10L, G11C7/16, G06T9/00T, G11C5/14B|
|Oct 12, 2005||AS||Assignment|
Owner name: SIGMATEL, INC., TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DIGITAL NETWORKS NORTH AMERICA, INC. BY DAVID MEISELS, GENERAL COUNSEL, D&M HOLDINGS US, INC.;REEL/FRAME:016636/0713
Effective date: 20051011
|Nov 14, 2005||AS||Assignment|
Owner name: DIGITALCAST, INC., KOREA, REPUBLIC OF
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HWANG, JUNG-HA;REEL/FRAME:016772/0922
Effective date: 19980701
|Nov 16, 2005||AS||Assignment|
Owner name: DIAMOND MULTIMEDIA SYSTEMS, INC., CALIFORNIA
Free format text: SHARE TRANSFER AGREEMENT;ASSIGNOR:DIGITALCAST, INC.;REEL/FRAME:016784/0434
Effective date: 19980825
Owner name: DIGITAL NETWORKS NORTH AMERICA, INC., CALIFORNIA
Free format text: ASSET PURCHASE AGREEMENT;ASSIGNOR:DIAMOND MULTIMEDIA SYSTEMS, INC.;REEL/FRAME:016784/0451
Effective date: 20030424
|Jan 11, 2006||AS||Assignment|
Owner name: SIGMATEL, INC., TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MPMAN.COM, INC.;REEL/FRAME:017181/0817
Effective date: 20060103
|May 4, 2006||AS||Assignment|
Owner name: SIGMATEL, INC., TEXAS
Free format text: CORRECTIVE ASSIGNMENT TO CORRECT DOCKET NO. ON AN ASSIGNMENT PREVIOUSLY RECORDED ON REEL 017181 FRAME 0817;ASSIGNOR:MPMAN.COM, INC.;REEL/FRAME:017583/0561
Effective date: 20060103
|Sep 11, 2006||AS||Assignment|
Owner name: TEXAS MP3 TECHNOLOGIES, LTD., TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SIGMATEL, INC.;REEL/FRAME:018239/0878
Effective date: 20060725
|Sep 22, 2006||AS||Assignment|
Owner name: SIGMATEL, INC., TEXAS
Free format text: SECURITY AGREEMENT;ASSIGNORS:TEXAS MP3 TECHNOLOGIES, LTD.;SIGMATEL, INC.;REEL/FRAME:018296/0771
Effective date: 20060724
|Jan 19, 2007||AS||Assignment|
Owner name: S3 INCORPORATED, CALIFORNIA
Free format text: ASSET PURCHASE;ASSIGNOR:RIOPORT.COM, INC.;REEL/FRAME:018787/0287
Effective date: 20000201
Owner name: DIAMOND MULTMEDIA SYSTEMS, INC., CALIFORNIA
Free format text: MERGER;ASSIGNOR:DENMARK ACQUISITION SUB, INC.;REEL/FRAME:018787/0333
Effective date: 19990924
Owner name: DIGITAL NETWORKS NORTH AMERICA, INC., CALIFORNIA
Free format text: ASSET PURCHASE;ASSIGNORS:SONICBLUE INCORPORATED;DIAMOND MULTIMEDIA SYSTEMS, INC.;REEL/FRAME:018787/0449
Effective date: 20030424
Owner name: SONICBLUE INCORPORATED, CALIFORNIA
Free format text: MERGER AND CHANGE OF NAME;ASSIGNOR:S3 INCORPORATED;REEL/FRAME:018787/0284
Effective date: 20001115
Owner name: RIOPORT, INC. (KOREA), KOREA, REPUBLIC OF
Free format text: CHANGE OF NAME;ASSIGNOR:DIGITALCAST, INC.;REEL/FRAME:018787/0328
Effective date: 19990409
Owner name: SONICBLUE INCORPORATED, CALIFORNIA
Free format text: DISSOLUTION;ASSIGNOR:SONIC BLUE KOREA, INC.;REEL/FRAME:018787/0272
Effective date: 20011227
|Feb 12, 2007||AS||Assignment|
Owner name: S3 INCORPORATED, CALIFORNIA
Free format text: MERGER;ASSIGNOR:DIAMOND MULTIMEDIA SYSTEMS, INC.;REEL/FRAME:018917/0749
Effective date: 19990621
|Jun 20, 2007||AS||Assignment|
Owner name: SAEHAN INFORMATION SYSTEM, INC., KOREA, REPUBLIC O
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOON, KWANG-SU;REEL/FRAME:019458/0287
Effective date: 19980701
Owner name: MPMAN.COM, INC., KOREA, REPUBLIC OF
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAEHAN INFORMATION SYSTEM, INC.;REEL/FRAME:019458/0289
Effective date: 20010307
Owner name: SONIC BLUE KOREA, INC., KOREA, REPUBLIC OF
Free format text: CHANGE OF NAME;ASSIGNOR:RIOPORT, INC. (KOREA);REEL/FRAME:019458/0291
Effective date: 20001130
|Sep 25, 2007||RR||Request for reexamination filed|
Effective date: 20070712
|Jun 29, 2009||FPAY||Fee payment|
Year of fee payment: 4
|Nov 23, 2010||AS||Assignment|
Owner name: MPMAN.COM, INC., KOREA, REPUBLIC OF
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TEXAS MP3 TECHNOLOGIES, LTD.;REEL/FRAME:025398/0699
Effective date: 20101122
|Dec 18, 2013||FPAY||Fee payment|
Year of fee payment: 8
|Apr 29, 2014||B1||Reexamination certificate first reexamination|
Free format text: CLAIMS 1-30 ARE CANCELLED.NEW CLAIM 31 IS ADDED AND DETERMINED TO BE PATENTABLE.